<!DOCTYPE html>
<html lang="cn">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css"></style>
   
</head>
<body>
    <script>
        alert(123);
        console.log(123);
        alert(321);
        document.write(123==123);
    </script>

</body>
</html>


